These 6061 Solid Billet bushings are much harder compared to the OEM units. By replacing them with these Solid Billet Inserts you are able to get rid of the unwanted slop and flexing of the stock units which allows for the power to go into rotating the tires, instead of flexing the rubber. Giving you better feedback, sharper response, more predictability on throttle input, along with eliminating annoying clunking during hard shifts. -Eliminates the " CLUNK " when shifting hard -Reduces wheel hop / traction loss -Improved 60fts / e.t's -Anodized Black 6061 Billet -Lifetime Warranty -Made in USA